Fitting for revolving chairs and the like



July 10, 1923. 1.461.602

R. K. DAWSON FITTING FOR REVOLVING CHAIRS AND THE LIKE Filed June 131921 Ill ' the legs.

Patented July 10, 1923.

ROBERT x. DAWSON, or GUELI'H, ONTARIO, CANADA,

FIT'IDTG'EOB REVOLVING CHAIRS THE LIKE.

Application filed time 1a, 1921'. Serial 110-. an.

To all whom it may concern Be it known that I, Roannr K. Dawson, asubject of the King of Great Britain, residing at Guelph, in theProvince of Ontario, Dominion of Canada, have invented anew and usefulImprovement in Fittin .for Revolving Chairs and the like, of which thefollowing is a specification.

This invention relates to fittings for revolving chairs, and morearticularly to the means for securing toget er the legs-of a. chair andto means for adjusting the height of the seat of the chair. i

The objects of the invention are to provide in a chair base, means ofimproved construction for grippingor engaging the upper and lower edgesof the legs so as to facilitate the-assembling of the chairs; also toprovide-a chair basein which thelegs of the chair are clamped togetherby means of:

the usual upright chair spindle; alsoto provide means improveconstruction for adjusting the seat'of the chair with respect to thebase thereof; also to improve the construction of chair fittings of thiskind in other respects hereinafter specified.

In the accompanying drawln s:

Fig. 1 is a fragmentary side ovation of a chair fitting embodying theinvention showin the same applied to the legs of a chair.

ig. 2 is a fragmentar central sectional elevation thereof on an en urgedscale. 0

Fig. 3 is an elevation of the lower portion of the fitting detached fromthe chair legs.

Fig. 4 is a sectional plan view thereof on line 4-4. Fig. 2.

Fig. 5 1s atop plan view of the lower leg on aging plate.

ig. 6 is a fragmentary sectional elevation of the chair base on line6-6, F g. 4.

A represents the legs of a chair which terminate at and are secured tothe hub portion of the chair fitting. The chair legs are preferablyprovided at their inner ends with enlarged parts or shouldered portionsa, pro'ecting beyond the upper andlower edges of e legs, and cornerpieces a of usual construction are preferab y arranged between The meansfor securing the le together are preferably constructed as to lows- Theupper faces of the legs A are adapts to be en 'a ed by means of a sheetmetal plate or B preferably having a peripheral downwardly turned flangeengagm the edges of the shouldered portions a o sired, the upper videdwith cylin the legs. These-flanges also serve to hold; the corner p eces-a'-inplace between adjacent legs. he lower faces of the legs and thecorner ieces are engaged by a correspondln p ate Bbhavmg an upwardlyturned nge b, and-this plate is preferably prov ded with a pluralit ofupwardly extend ng, substantially cy indrical or portions b extendininto corrcs ondingly shaped holes in the fiiwer faces 0 the. legs A. Thecylindrical portions 6 are. preferably formed integral with the plate Bby stamping or forming in suitable dies. If deplate B may also be pror1cal projections of this type but these projections are preferablyomitted from the upper plate as shown in.

the drawin s. The rejections are provided with c lmdiucal'wa. s which inentering into the ho es in the legs, securely hold the legs inplace'with regard to the plate B and which take theplace of the usualwood screws heretofore provided for securing the legs to the lates ofthe chair hub. The plates B an B may be made. of comparatively thinsheet metal so thatthe cost of manufacture of the same is ready reduced.In order to prevent the platesB and B from bein bent or otherwisedistorted, owiu to t effect that the are made of relatively thin metal,suite is reinforcing flanges or members are provided which ongage theupper and lower leg engaging platesto hold the same in correct relationto' the legs and prevent the buckling or warping of the plates may esubjected. In the construction shown for this purpose, reinforcingdisks, flanges or members C and C. are provided which are adapted toengage portions of the leg engaging plates. These reinforcing membarsare preferably made somewhat smaller than the plates B B and the lowerrelnforcing member is preferably made of sufiicient size to cover thoseportions of the lower leg engaging plate which are provided with thebosses or projections b, so asto hold these bosses secure y inengagement with the chair legs.

The reinforcing members may be pressed into clamping engagement with theleg engaging plates by any suitable means, clampmg nuts D D beingemployed in the particular embodiment of the invention shown, which maybe moved in any suitable manner into positions'to cause'the reinforcingmemplates due to strains to which the.

hers

with the legen'ga' 'in 'lapesehd theep'lhtesiiiito c m g en agement withto-engege the leg engagin letes. the paa tlcnlazi' co'nstrilctioh sfioi'nhn' th" drawin these nuts'engage an upright central 1m member esshqnes n th form of a central spin e or stem E of the chair and whichextendscentrell between the legs and corner pieces a. 12m lower portionof this centralilpiight mem'benis screw threaded and b turpin either oneof the-elem ifigniit t" reon, ee nuts; to: gther \Vlltll? the'"rinfprcin'gflan'ges 01" parts thewper 'anddbwier' was of the legs. Therdihfoxdihgdisk's or fleiiges C'C may, if desired; "be formed"integpsll' with the" nuts D DJfAny otherineansfor pressing thereinfp'rcin timbers" into ''nga l'nent with the filiite's'B B" maybe'employ ""B imam; O fltl'L-IS a mament, the veinforcing disksl'oi'fl'ztngeh iin'i'p the 'pliites agiiihsttfie'1egs;'sdthate chang ofshepe offth ieih'foifiiiig'disks' is entirely prevented, a'ziitl in theCilfi oftlie Lower'ie engaging; pimetne cylindricziFpoit-ions or bom'esware seci'ii'ely heldin'e'ngegement in the'ho'les inthe legs:Thishtiiietifletion' he's the"adv illntag e ofehtiz'lfll'y-elimihittingi the hee of siiiws in 'sechriilg thelegs to' t 1eh'ub poi-- tion" of, the chair and "thereby saves a,consigerahleidi'noi'xnt offtime and expense in the a" mbliflg of'tlie'chali'r 'The eonstruction' iifs'fehe'furthe aflv'ehtiwe tliag in casetlie l gs dlfthe'ehiii'zshrinkdii'e to other caus'ee? ti hten'edoh th'eindle so as to se'cuily clihp the l'e'gsf" n ordei'"to prevent then'iits'fiom beeoiiiing lodsend on the spindle, set'scrfiefirp'r'eferebly rovi'de'diii the units which iillfghg-"th'e' sp'ili"'it'ndprvent' releltiv iiiove'meiiij' be weeii thenuteend the spindle."By"s6ci1riiig'"the spindle rigidly in the chair'f 52196; a; very rigidchaif con st'fuctionis'prod'liced amid loet'motifon be tii'eehthe .eatdfthe cii'aiir endtlie'base is coxl'"ideltxblj"=rednced owing to thefect'that the'looseiiess'br lost'x'noti'o'n'can only bebetive'enthwseht' hndthe spindle and not-beht'e fe'ii theh 'dse :ind thespindle. Since this use iiiotion-iix' ilh'be closef't'o the s lit bymeans of'thisi cons tinction, the amount of sn'cli motion isco'i-tespohdinwly reduced.

The s'z it '(hot'shoi yh) of me chziir ma be ivothllysup'poited on thespindle E in'nny ei id mzihrier, for ei'mrii'glethe chair sent ifia'yseciiidtd'e shite 1e spider includ ing arms F ri 'dly connected toa'centijs l conneiitinq' me bei' Thisconnecting miiih'e'r o ithe'spider'is iivot'ed'at/ p 'wing oti-2ii-'evoli1ble'inember arifanged to rotateahfiiit the new the s'temor spindle E in vertically ori tlie themorSpin'le lowing 'consti'h'ction is preferably employed:

a, vertion the cally adjustable s'ieeve' G. attiulg d. stem or spindleE, a ball beat" 9 being referehly, though; not ecessa y, interposed'bet'weenthe' sleev' G'and the revoluble memben he l miq? P die E isprovided vvith a keyway e in wl-hch a. art of the adyustable' sleeve Ur.engagesto old the sleeve against turning. In the construction shown,this sleeve is providedwith a. 'screw 01'" stud g" adapted to extendinto the keywey hind thus revent the turiling oftlle sleeve onithe. spine. The'sleeve isprovidedwith al'qt erel. extension g in when the A anadjusting screw H is rot itab The revoluble membep fibeers helcL this 11erendz-di V screw', in the construction shdwn,'being"p1:o-

vided in its upper end with an, annular groove h, Fig. 2, into which a,screw or'hfild It" bf the'edjusteble sleeveGextends so that the adjgsting scre'w is free to turn aboutits. axis relatively to thead ustingsleeve, 11111; is held from endwise movement-thereof- The ad'ustingscrew' isp'rovi'cled. .witHI a,

threude 1301131011 which enga eS with apart of the chair hese, forexainp e, withen'inteinelly threaded stud I which, in the'com strnctionshown, is formedinte rel. with the reinforc'in flange or disk (12"he-lower end of the nueting. screw extends down? werdly into thehuUpontion of the chain, preferably into a hole iin one oithe'coriidrpieces a of-the liuh, theupper plete'B-..h6: ing' piovided' with acorresponding holethrough which theadjilsting screw; passes, In orderto"tnrn the adjusting screw i611: raising or lowering1 the sleeveGonthspin- (Helix; hand whee .or the like hislpt-ovjded on the a'djustinsc'r'ew. In orderjo'presient the fevoluble memberfhiiiltlgbllCPBIifibQfl: nected'therewith from moving upwaidly. 'o'iltof en agem'ent withthe stem or. spindiehheil, the 6 'air is lifted bythe seetQthe adjusteble sleeve G-is 'pihferably providedwith-anleri;nulnr outwardly extending flange 'k-Wiih which a screw or part Inextendifig throu a downward extending lip or projec'tio1n% of the revolnle member f, en ages. I

The cb'nstruction described or adjugting this seat relatively to thebase o'hthecheilz, has the advantage of requiring a. companitiv'elysmall number of parts, this being-ac: complished by foi ining thethrade'dlu integral with the reinforcin membej' C. providing the steinorsbindle Ewitli e kej Way in which the scr ew or' pin 9 ,eiigegea, theadjustable 'sleeve G is held against tum ing without subjecting theedjnstingecnew, to'the twists which result fromWhereypLving of the seaton the spindle, dpe v 0 fzitiqn. between the adjusting sleeve and thqrevoluble member f. The constnuetion dfescribed is simple andefiicientjendfredupee not only the cost ofithe metajl fjoi tiong oftherevolving cheii butelso r'edums. mi} c geti of producing the chair owihgto the fagt Ill) said legs,

that the parts of the chair can bemore readily assembled than withfittings for chairs or the like heretofore used.

I claim as my invention:

1. Means for connecting the legs of chairs and the like includ' a plateof relatively thin material adapt to engage said legs, cylindricalprojecting parts extending outwardly from said plate and formed integraltherewith, a reinforcing member of thicker material adapted to engagesaid plate at the juncture of said projecting parts with said plate, andmeans for drawing smd member into clamping engagement with said late.

2. Means for connecting the legs of c airs and the like including acentral seat supporting spindle, plates of relatively thin metal throughwhich said spindle extends and which engage the upper and lower faces ofsaid legs, reinforcing members adapted to engage said plates, and meanscooperating with said spindle to move said reinforc ng members intoclamping engagement with said leg engaging plates and to rigidly supportsaid spindle on said lags.

3. Means for connecting e legs of chairs and the like including acentral seat supporting spindle plates of relatively thin metal throughwhich said spindle extends and which engage the upper and lower faces ofand reinforcing members adapted to engage said plates and having athreaded engagement with said spindle, whereby the turning of saidreinforcing members relatively to said spindle causes said plates toclamp said legs and causes said spindle to be r' idly supported on saidlegs.

4. n a chair, the combination of a base including a clampin member forsecuring together the parts 0 the base, an 11 right member secured tosaid base by said ampin member and engaged thereby, a sleeve adjustablevertically on said upright mem-. her, and an adjustin screw connectingsaid clamping member an said sleeve for adjust; in said sleeve on saidupright member.

The combination of an upright spindle, legs arranged about said s in la,a clampin" member having a threads engagement with said spindle andadapted to be pressed against said 1e for clamping said legs inoperative relation to each other and for securing said spindle rigidlyto said legs a vertically adjustable sleeve on said spindle, and an adjustingdeviee engaging said sleeve and said clamping member for adjustingsaid sleeve lengthwise of said spindle.

6. The combination of a chair base including an upright member arran insaid base, a clamping member secure to said upright member for securingtogether the parts of said base, a vertically adjustable member, and anadjusting device connecting said adjustable member and said clampingmember for adjusting said adjustable member vertically relatively tosaid base.

7. The combination of a chair base including an upright member arrangedsubstantially centrall in said base, means for clamping toget er theparts of the base including a clamping member connected with sid uprightmember, a vertically adjustable member, and an adjusting screwconnecting said clamping member and said vertically adjustable memberfor holding said adjustab e member in any desired position.

8. Means for connecting the legs of chairs and the like, includi acentral upri ht part having an externa y threaded portion, a plate ofrelatively thin material through which said upright part extends, areinforcing member including a nut portion having a threaded engagementwith said upright part and anintegral outwardly extending ortion adaptedto engage said plate to reinorce the same, a member adjustable axiallywith reference to said base, and an adjusting screw connecting saidmember and said outwardly extending portion of said reinforcing member.

9. The combination of an upright spindle, legs arranged about saidspindle, a clampin member engaging said 3 indle and adapted to bepressed against sai legs for clamping said spindle to said legs, saidspindle having a ke Way, a vertical y adjustable member slide 1yarranged on said s indle and havin a art engagin said lieyway to holdsaid adjustable mem er against turning, and means connectin saidvertically adjustable member and sai clamping member for adjusting saidadjustable member lengthwise of said spindle.

ROBERT K DAWSON.

